package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.dto.DishDto;
import com.itheima.reggie.entity.Dish;
import com.itheima.reggie.entity.DishFlavor;
import com.itheima.reggie.mapper.DishMapper;
import com.itheima.reggie.service.DishFlavorService;
import com.itheima.reggie.service.DishService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;

@Service
@Slf4j
public class DishServiceImpl extends ServiceImpl<DishMapper, Dish> implements DishService {
    @Autowired
    private DishFlavorService dishFlavorService;
    @Override // 新增菜品同时保存对应的口味数据
    @Transactional // 如果类加了这个注解，那么这个类里面的方法抛出异常，就会回滚，数据库里面的数据也会回滚。防止其中一张表改变而程序除了异常导致另一张表未被改变
    public void saveWithFlavor(DishDto dishDto) {
        this.save(dishDto); // this.save(dishDto) == dishDao.insert(dishDto)

        Long dishId = dishDto.getId(); // 菜品ID;

        List<DishFlavor> flavors = dishDto.getFlavors();
        for (DishFlavor temp : flavors) {
            temp.setDishId(dishId);
        }


        // 保存菜品口味数据到菜品口味表dish_flavour
        dishFlavorService.saveBatch(dishDto.getFlavors()); // 批量保存
    }

    // 根据id查询菜品信息和口味信息
    @Override
    public DishDto getByIdWithFlavor(Long id) {

        DishDto dishDto = new DishDto();
        // 查询菜品基本细腻，
        Dish dish = this.getById(id); // this指的是它的Service即DishService
        BeanUtils.copyProperties(dish, dishDto);
        // 查询菜品对应的口味信息
        LambdaQueryWrapper<DishFlavor> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(DishFlavor::getDishId, dish.getId());
        List<DishFlavor> flavors = dishFlavorService.list(queryWrapper);
        dishDto.setFlavors(flavors);
        return dishDto;
    }

    @Override
    public void updateWithFlavor(DishDto dishDto) {
        // 更新dish表基本信息
        this.updateById(dishDto);
        // 清理当前菜品对应的口味数据
        LambdaQueryWrapper<DishFlavor> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(DishFlavor::getDishId, dishDto.getId());
        dishFlavorService.remove(queryWrapper);
        // 添加当前提交过来的口味数据
        List<DishFlavor> flavors = dishDto.getFlavors();
        for (DishFlavor temp : flavors) {
            temp.setDishId(dishDto.getId());
        }
        dishFlavorService.saveBatch(flavors);
    }
}
